function P7_swapClass(){ //v1.4 by PVII
	var i,x,tB,j=0,tA=new Array(),arg=P7_swapClass.arguments;
	if(document.getElementsByTagName){
		for(i=4;i<arg.length;i++){
			tB=document.getElementsByTagName(arg[i]);
			for(x=0;x<tB.length;x++){
				tA[j]=tB[x];j++;
			}
		}
		for(i=0;i<tA.length;i++){
			if(tA[i].className){
				if(tA[i].id==arg[1]){
					if(arg[0]==1){
						tA[i].className=(tA[i].className==arg[3])?arg[2]:arg[3];
					}
					else{tA[i].className=arg[2];}
				}
				else if(arg[0]==1 && arg[1]=='none'){
					if(tA[i].className==arg[2] || tA[i].className==arg[3]){
						tA[i].className=(tA[i].className==arg[3])?arg[2]:arg[3];
					}
				}
				else if(tA[i].className==arg[2]){
					tA[i].className=arg[3];}
				}
			}
	}
}

	function change_style(id, value) {
		var element_style=null
		if (document.getElementById) {
		  element_style=document.getElementById(id).style;
		} else if (document.all) {
		  element_style=document.all[id].style;
		} else if (document.layers) {
		  element_style=document.layers[id];
		} 
		if(element_style) {
		element_style.backgroundPosition=value;
		}
		
}